Original author(s) | Ray Tomlinson |
---|---|
Initial release | 1972 |
Operating system | TENEX |
Reaper was the first anti-virus software. It was created by Ray Tomlinson to move across the ARPANET and delete the transmitting Creeper program.[1] Creeper had been an experimental computer program originally written by Bob Thomas at BBN in 1971.[2] Its original iteration was designed to move between DEC PDP-10 mainframe computers running the TENEX operating system using the ARPANET. A later version by Ray Tomlinson designed to copy itself between computers rather than simply move, thus making Ray Tomlinson the father of the computer worm.[1]
Creeper was not malicious but was the first example of a computer worm.[3][4] The only effect being a message it output to the teletype reading "I'm the creeper: catch me if you can".[4] Strictly speaking, the second worm introduced on ARPANET was Reaper as it was a worm, meant to delete any instances of Creeper that it could find.[1]